Rite in the Rain Weatherproof Bulk Copier Paper, 8.5" x 11", 20# Gray, 500 Sheet Pack (No. 208511GY) WEATHERPROOF PAPER: 500 sheets of gray 20# Copy Paper per pack. This paper that wont turn to mush when wet and will repel water, sweat, grease, mud, and even survive the accidental laundry mishap and more COPY / LASER PRINT: Print your own forms, charges, maps, worksheets, and other important documents on Rite in the Rain Copy Paper. Unlink other synthetics, Rite in the Rain won't wash or rub off in harsh conditions. NOT FOR INKJET PRINTERS. WHAT TO WRITE WITH: Use a Pencil or All-Weather Pen and your notes will stay intact. Standard Ballpoint pens will work when paper is dry. Water-based inks will bead off Rite in the Rain sheets. PRINTING: Unlike synthetics, Rite in the Rain won't collect a static charge while printing and duplexing and there is no risk of melting in your machine. RECYCLABILITY: In spite of Rite in the Rain's durability, it is completely recyclable. Simply recycle Rite in the Rain as you do other white or printed papers.